cmd/fdt.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2007
   4  * Gerald Van Baren, Custom IDEAS, [email protected]
   5  * Based on code written by:
   6  *   Pantelis Antoniou <[email protected]> and
   7  *   Matthew McClintock <[email protected]>
   8  */
   9
  10 #include <common.h>
  11 #include <command.h>
  12 #include <env.h>
  13 #include <image.h>
  14 #include <linux/ctype.h>
  15 #include <linux/types.h>
  16 #include <asm/global_data.h>
  17 #include <linux/libfdt.h>
  18 #include <fdt_support.h>
  19 #include <mapmem.h>
  20 #include <asm/io.h>
  21
  22 #define MAX_LEVEL       32              /* how deeply nested we will go */
  23 #define SCRATCHPAD      1024            /* bytes of scratchpad memory */
  24
  25 /*
  26  * Global data (for the gd->bd)
  27  */
  28 DECLARE_GLOBAL_DATA_PTR;
  29
  30 static int fdt_parse_prop(char *const*newval, int count, char *data, int *len);
  31 static int fdt_print(const char *pathp, char *prop, int depth);
  32 static int is_printable_string(const void *data, int len);
  33
  34 /*
  35  * The working_fdt points to our working flattened device tree.
  36  */
  37 struct fdt_header *working_fdt;
  38
  39 void set_working_fdt_addr(ulong addr)
  40 {
  41         void *buf;
  42
  43         buf = map_sysmem(addr, 0);
  44         working_fdt = buf;
  45         env_set_hex("fdtaddr", addr);
  46 }
  47
  48 /*
  49  * Get a value from the fdt and format it to be set in the environment
  50  */
  51 static int fdt_value_env_set(const void *nodep, int len, const char *var)
  52 {
  53         if (is_printable_string(nodep, len))
  54                 env_set(var, (void *)nodep);
  55         else if (len == 4) {
  56                 char buf[11];
  57
  58                 sprintf(buf, "0x%08X", fdt32_to_cpu(*(fdt32_t *)nodep));
  59                 env_set(var, buf);
  60         } else if (len%4 == 0 && len <= 20) {
  61                 /* Needed to print things like sha1 hashes. */
  62                 char buf[41];
  63                 int i;
  64
  65                 for (i = 0; i < len; i += sizeof(unsigned int))
  66                         sprintf(buf + (i * 2), "%08x",
  67                                 *(unsigned int *)(nodep + i));
  68                 env_set(var, buf);
  69         } else {
  70                 printf("error: unprintable value\n");
  71                 return 1;
  72         }
  73         return 0;
  74 }
  75
  76 static const char * const fdt_member_table[] = {
  77         "magic",
  78         "totalsize",
  79         "off_dt_struct",
  80         "off_dt_strings",
  81         "off_mem_rsvmap",
  82         "version",
  83         "last_comp_version",
  84         "boot_cpuid_phys",
  85         "size_dt_strings",
  86         "size_dt_struct",
  87 };
  88
  89 static int fdt_get_header_value(int argc, char *const argv[])
  90 {
  91         fdt32_t *fdtp = (fdt32_t *)working_fdt;
  92         ulong val;
  93         int i;
  94
  95         if (argv[2][0] != 'g')
  96                 return CMD_RET_FAILURE;
  97
  98         for (i = 0; i < ARRAY_SIZE(fdt_member_table); i++) {
  99                 if (strcmp(fdt_member_table[i], argv[4]))
 100                         continue;
 101
 102                 val = fdt32_to_cpu(fdtp[i]);
 103                 env_set_hex(argv[3], val);
 104                 return CMD_RET_SUCCESS;
 105         }
 106
 107         return CMD_RET_FAILURE;
 108 }
 109
 110 /*
 111  * Flattened Device Tree command, see the help for parameter definitions.
 112  */
 113 static int do_fdt(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 114 {
 115         if (argc < 2)
 116                 return CMD_RET_USAGE;
 117
 118         /* fdt addr: Set the address of the fdt */
 119         if (strncmp(argv[1], "ad", 2) == 0) {
 120                 unsigned long addr;
 121                 int control = 0;
 122                 struct fdt_header *blob;
 123
 124                 /* Set the address [and length] of the fdt */
 125                 argc -= 2;
 126                 argv += 2;
 127                 if (argc && !strcmp(*argv, "-c")) {
 128                         control = 1;
 129                         argc--;
 130                         argv++;
 131                 }
 132                 if (argc == 0) {
 133                         if (control)
 134                                 blob = (struct fdt_header *)gd->fdt_blob;
 135                         else
 136                                 blob = working_fdt;
 137                         if (!blob || !fdt_valid(&blob))
 138                                 return 1;
 139                         printf("%s fdt: %08lx\n",
 140                                control ? "Control" : "Working",
 141                                control ? (ulong)map_to_sysmem(blob) :
 142                                env_get_hex("fdtaddr", 0));
 143                         return 0;
 144                 }
 145
 146                 addr = simple_strtoul(argv[0], NULL, 16);
 147                 blob = map_sysmem(addr, 0);
 148                 if (!fdt_valid(&blob))
 149                         return 1;
 150                 if (control)
 151                         gd->fdt_blob = blob;
 152                 else
 153                         set_working_fdt_addr(addr);
 154
 155                 if (argc >= 2) {
 156                         int  len;
 157                         int  err;
 158
 159                         /* Optional new length */
 160                         len = simple_strtoul(argv[1], NULL, 16);
 161                         if (len < fdt_totalsize(blob)) {
 162                                 printf("New length %d < existing length %d, ignoring\n",
 163                                        len, fdt_totalsize(blob));
 164                         } else {
 165                                 /* Open in place with a new length */
 166                                 err = fdt_open_into(blob, blob, len);
 167                                 if (err != 0) {
 168                                         printf("libfdt fdt_open_into(): %s\n",
 169                                                fdt_strerror(err));
 170                                 }
 171                         }
 172                 }
 173
 174                 return CMD_RET_SUCCESS;
 175         }
 176
 177         if (!working_fdt) {
 178                 puts("No FDT memory address configured. Please configure\n"
 179                      "the FDT address via \"fdt addr <address>\" command.\n"
 180                      "Aborting!\n");
 181                 return CMD_RET_FAILURE;
 182         }
 183
 184         /*
 185          * Move the working_fdt
 186          */
 187         if (strncmp(argv[1], "mo", 2) == 0) {
 188                 struct fdt_header *newaddr;
 189                 int  len;
 190                 int  err;
 191
 192                 if (argc < 4)
 193                         return CMD_RET_USAGE;
 194
 195                 /*
 196                  * Set the address and length of the fdt.
 197                  */
 198                 working_fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
 199                 if (!fdt_valid(&working_fdt))
 200                         return 1;
 201
 202                 newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16);
 203
 204                 /*
 205                  * If the user specifies a length, use that.  Otherwise use the
 206                  * current length.
 207                  */
 208                 if (argc <= 4) {
 209                         len = fdt_totalsize(working_fdt);
 210                 } else {
 211                         len = simple_strtoul(argv[4], NULL, 16);
 212                         if (len < fdt_totalsize(working_fdt)) {
 213                                 printf ("New length 0x%X < existing length "
 214                                         "0x%X, aborting.\n",
 215                                         len, fdt_totalsize(working_fdt));
 216                                 return 1;
 217                         }
 218                 }
 219
 220                 /*
 221                  * Copy to the new location.
 222                  */
 223                 err = fdt_open_into(working_fdt, newaddr, len);
 224                 if (err != 0) {
 225                         printf ("libfdt fdt_open_into(): %s\n",
 226                                 fdt_strerror(err));
 227                         return 1;
 228                 }
 229                 set_working_fdt_addr((ulong)newaddr);
 230 #ifdef CONFIG_OF_SYSTEM_SETUP
 231         /* Call the board-specific fixup routine */
 232         } else if (strncmp(argv[1], "sys", 3) == 0) {
 233                 int err = ft_system_setup(working_fdt, gd->bd);
 234
 235                 if (err) {
 236                         printf("Failed to add system information to FDT: %s\n",
 237                                fdt_strerror(err));
 238                         return CMD_RET_FAILURE;
 239                 }
 240 #endif
 241         /*
 242          * Make a new node
 243          */
 244         } else if (strncmp(argv[1], "mk", 2) == 0) {
 245                 char *pathp;            /* path */
 246                 char *nodep;            /* new node to add */
 247                 int  nodeoffset;        /* node offset from libfdt */
 248                 int  err;
 249
 250                 /*
 251                  * Parameters: Node path, new node to be appended to the path.
 252                  */
 253                 if (argc < 4)
 254                         return CMD_RET_USAGE;
 255
 256                 pathp = argv[2];
 257                 nodep = argv[3];
 258
 259                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 260                 if (nodeoffset < 0) {
 261                         /*
 262                          * Not found or something else bad happened.
 263                          */
 264                         printf ("libfdt fdt_path_offset() returned %s\n",
 265                                 fdt_strerror(nodeoffset));
 266                         return 1;
 267                 }
 268                 err = fdt_add_subnode(working_fdt, nodeoffset, nodep);
 269                 if (err < 0) {
 270                         printf ("libfdt fdt_add_subnode(): %s\n",
 271                                 fdt_strerror(err));
 272                         return 1;
 273                 }
 274
 275         /*
 276          * Set the value of a property in the working_fdt.
 277          */
 278         } else if (strncmp(argv[1], "se", 2) == 0) {
 279                 char *pathp;            /* path */
 280                 char *prop;             /* property */
 281                 int  nodeoffset;        /* node offset from libfdt */
 282                 static char data[SCRATCHPAD] __aligned(4);/* property storage */
 283                 const void *ptmp;
 284                 int  len;               /* new length of the property */
 285                 int  ret;               /* return value */
 286
 287                 /*
 288                  * Parameters: Node path, property, optional value.
 289                  */
 290                 if (argc < 4)
 291                         return CMD_RET_USAGE;
 292
 293                 pathp  = argv[2];
 294                 prop   = argv[3];
 295
 296                 nodeoffset = fdt_path_offset (working_fdt, pathp);
 297                 if (nodeoffset < 0) {
 298                         /*
 299                          * Not found or something else bad happened.
 300                          */
 301                         printf ("libfdt fdt_path_offset() returned %s\n",
 302                                 fdt_strerror(nodeoffset));
 303                         return 1;
 304                 }
 305
 306                 if (argc == 4) {
 307                         len = 0;
 308                 } else {
 309                         ptmp = fdt_getprop(working_fdt, nodeoffset, prop, &len);
 310                         if (len > SCRATCHPAD) {
 311                                 printf("prop (%d) doesn't fit in scratchpad!\n",
 312                                        len);
 313                                 return 1;
 314                         }
 315                         if (ptmp != NULL)
 316                                 memcpy(data, ptmp, len);
 317
 318                         ret = fdt_parse_prop(&argv[4], argc - 4, data, &len);
 319                         if (ret != 0)
 320                                 return ret;
 321                 }
 322
 323                 ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len);
 324                 if (ret < 0) {
 325                         printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret));
 326                         return 1;
 327                 }
 328
 329         /********************************************************************
 330          * Get the value of a property in the working_fdt.
 331          ********************************************************************/
 332         } else if (argv[1][0] == 'g') {
 333                 char *subcmd;           /* sub-command */
 334                 char *pathp;            /* path */
 335                 char *prop;             /* property */
 336                 char *var;              /* variable to store result */
 337                 int  nodeoffset;        /* node offset from libfdt */
 338                 const void *nodep;      /* property node pointer */
 339                 int  len = 0;           /* new length of the property */
 340
 341                 /*
 342                  * Parameters: Node path, property, optional value.
 343                  */
 344                 if (argc < 5)
 345                         return CMD_RET_USAGE;
 346
 347                 subcmd = argv[2];
 348
 349                 if (argc < 6 && subcmd[0] != 's')
 350                         return CMD_RET_USAGE;
 351
 352                 var    = argv[3];
 353                 pathp  = argv[4];
 354                 prop   = argv[5];
 355
 356                 nodeoffset = fdt_path_offset(working_fdt, pathp);
 357                 if (nodeoffset < 0) {
 358                         /*
 359                          * Not found or something else bad happened.
 360                          */
 361                         printf("libfdt fdt_path_offset() returned %s\n",
 362                                 fdt_strerror(nodeoffset));
 363                         return 1;
 364                 }
 365
 366                 if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) {
 367                         int reqIndex = -1;
 368                         int startDepth = fdt_node_depth(
 369                                 working_fdt, nodeoffset);
 370                         int curDepth = startDepth;
 371                         int curIndex = -1;
 372                         int nextNodeOffset = fdt_next_node(
 373                                 working_fdt, nodeoffset, &curDepth);
 374
 375                         if (subcmd[0] == 'n')
 376                                 reqIndex = simple_strtoul(argv[5], NULL, 16);
 377
 378                         while (curDepth > startDepth) {
 379                                 if (curDepth == startDepth + 1)
 380                                         curIndex++;
 381                                 if (subcmd[0] == 'n' && curIndex == reqIndex) {
 382                                         const char *node_name;
 383
 384                                         node_name = fdt_get_name(working_fdt,
 385                                                                  nextNodeOffset,
 386                                                                  NULL);
 387                                         env_set(var, node_name);
 388                                         return 0;
 389                                 }
 390                                 nextNodeOffset = fdt_next_node(
 391                                         working_fdt, nextNodeOffset, &curDepth);
 392                                 if (nextNodeOffset < 0)
 393                                         break;
 394                         }
 395                         if (subcmd[0] == 's') {
 396                                 /* get the num nodes at this level */
 397                                 env_set_ulong(var, curIndex + 1);
 398                         } else {
 399                                 /* node index not found */
 400                                 printf("libfdt node not found\n");
 401                                 return 1;
 402                         }
 403                 } else {
 404                         nodep = fdt_getprop(
 405                                 working_fdt, nodeoffset, prop, &len);
 406                         if (len == 0) {
 407                                 /* no property value */
 408                                 env_set(var, "");
 409                                 return 0;
 410                         } else if (nodep && len > 0) {
 411                                 if (subcmd[0] == 'v') {
 412                                         int ret;
 413
 414                                         ret = fdt_value_env_set(nodep, len,
 415                                                                 var);
 416                                         if (ret != 0)
 417                                                 return ret;
 418                                 } else if (subcmd[0] == 'a') {
 419                                         /* Get address */
 420                                         char buf[11];
 421
 422                                         sprintf(buf, "0x%p", nodep);
 423                                         env_set(var, buf);
 424                                 } else if (subcmd[0] == 's') {
 425                                         /* Get size */
 426                                         char buf[11];
 427
 428                                         sprintf(buf, "0x%08X", len);
 429                                         env_set(var, buf);
 430                                 } else
 431                                         return CMD_RET_USAGE;
 432                                 return 0;
 433                         } else {
 434                                 printf("libfdt fdt_getprop(): %s\n",
 435                                         fdt_strerror(len));
 436                                 return 1;
 437                         }
 438                 }
 439
 440         /*
 441          * Print (recursive) / List (single level)
 442          */
 443         } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) {
 444                 int depth = MAX_LEVEL;  /* how deep to print */
 445                 char *pathp;            /* path */
 446                 char *prop;             /* property */
 447                 int  ret;               /* return value */
 448                 static char root[2] = "/";
 449
 450                 /*
 451                  * list is an alias for print, but limited to 1 level
 452                  */
 453                 if (argv[1][0] == 'l') {
 454                         depth = 1;
 455                 }
 456
 457                 /*
 458                  * Get the starting path.  The root node is an oddball,
 459                  * the offset is zero and has no name.
 460                  */
 461                 if (argc == 2)
 462                         pathp = root;
 463                 else
 464                         pathp = argv[2];
 465                 if (argc > 3)
 466                         prop = argv[3];
 467                 else
 468                         prop = NULL;
 469
 470                 ret = fdt_print(pathp, prop, depth);
 471                 if (ret != 0)
 472                         return ret;
 473
 474         /*
 475          * Remove a property/node
 476          */
 477         } else if (strncmp(argv[1], "rm", 2) == 0) {
 478                 int  nodeoffset;        /* node offset from libfdt */
 479                 int  err;
 480
 481                 /*
 482                  * Get the path.  The root node is an oddball, the offset
 483                  * is zero and has no name.
 484                  */
 485                 nodeoffset = fdt_path_offset (working_fdt, argv[2]);
 486                 if (nodeoffset < 0) {
 487                         /*
 488                          * Not found or something else bad happened.
 489                          */
 490                         printf ("libfdt fdt_path_offset() returned %s\n",
 491                                 fdt_strerror(nodeoffset));
 492                         return 1;
 493                 }
 494                 /*
 495                  * Do the delete.  A fourth parameter means delete a property,
 496                  * otherwise delete the node.
 497                  */
 498                 if (argc > 3) {
 499                         err = fdt_delprop(working_fdt, nodeoffset, argv[3]);
 500                         if (err < 0) {
 501                                 printf("libfdt fdt_delprop():  %s\n",
 502                                         fdt_strerror(err));
 503                                 return err;
 504                         }
 505                 } else {
 506                         err = fdt_del_node(working_fdt, nodeoffset);
 507                         if (err < 0) {
 508                                 printf("libfdt fdt_del_node():  %s\n",
 509                                         fdt_strerror(err));
 510                                 return err;
 511                         }
 512                 }
 513
 514         /*
 515          * Display header info
 516          */
 517         } else if (argv[1][0] == 'h') {
 518                 if (argc == 5)
 519                         return fdt_get_header_value(argc, argv);
 520
 521                 u32 version = fdt_version(working_fdt);
 522                 printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
 523                 printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
 524                        fdt_totalsize(working_fdt));
 525                 printf("off_dt_struct:\t\t0x%x\n",
 526                        fdt_off_dt_struct(working_fdt));
 527                 printf("off_dt_strings:\t\t0x%x\n",
 528                        fdt_off_dt_strings(working_fdt));
 529                 printf("off_mem_rsvmap:\t\t0x%x\n",
 530                        fdt_off_mem_rsvmap(working_fdt));
 531                 printf("version:\t\t%d\n", version);
 532                 printf("last_comp_version:\t%d\n",
 533                        fdt_last_comp_version(working_fdt));
 534                 if (version >= 2)
 535                         printf("boot_cpuid_phys:\t0x%x\n",
 536                                 fdt_boot_cpuid_phys(working_fdt));
 537                 if (version >= 3)
 538                         printf("size_dt_strings:\t0x%x\n",
 539                                 fdt_size_dt_strings(working_fdt));
 540                 if (version >= 17)
 541                         printf("size_dt_struct:\t\t0x%x\n",
 542                                 fdt_size_dt_struct(working_fdt));
 543                 printf("number mem_rsv:\t\t0x%x\n",
 544                        fdt_num_mem_rsv(working_fdt));
 545                 printf("\n");
 546
 547         /*
 548          * Set boot cpu id
 549          */
 550         } else if (strncmp(argv[1], "boo", 3) == 0) {
 551                 unsigned long tmp = simple_strtoul(argv[2], NULL, 16);
 552                 fdt_set_boot_cpuid_phys(working_fdt, tmp);
 553
 554         /*
 555          * memory command
 556          */
 557         } else if (strncmp(argv[1], "me", 2) == 0) {
 558                 uint64_t addr, size;
 559                 int err;
 560                 addr = simple_strtoull(argv[2], NULL, 16);
 561                 size = simple_strtoull(argv[3], NULL, 16);
 562                 err = fdt_fixup_memory(working_fdt, addr, size);
 563                 if (err < 0)
 564                         return err;
 565
 566         /*
 567          * mem reserve commands
 568          */
 569         } else if (strncmp(argv[1], "rs", 2) == 0) {
 570                 if (argv[2][0] == 'p') {
 571                         uint64_t addr, size;
 572                         int total = fdt_num_mem_rsv(working_fdt);
 573                         int j, err;
 574                         printf("index\t\t   start\t\t    size\n");
 575                         printf("-------------------------------"
 576                                 "-----------------\n");
 577                         for (j = 0; j < total; j++) {
 578                                 err = fdt_get_mem_rsv(working_fdt, j, &addr, &size);
 579                                 if (err < 0) {
 580                                         printf("libfdt fdt_get_mem_rsv():  %s\n",
 581                                                         fdt_strerror(err));
 582                                         return err;
 583                                 }
 584                                 printf("    %x\t%08x%08x\t%08x%08x\n", j,
 585                                         (u32)(addr >> 32),
 586                                         (u32)(addr & 0xffffffff),
 587                                         (u32)(size >> 32),
 588                                         (u32)(size & 0xffffffff));
 589                         }
 590                 } else if (argv[2][0] == 'a') {
 591                         uint64_t addr, size;
 592                         int err;
 593                         addr = simple_strtoull(argv[3], NULL, 16);
 594                         size = simple_strtoull(argv[4], NULL, 16);
 595                         err = fdt_add_mem_rsv(working_fdt, addr, size);
 596
 597                         if (err < 0) {
 598                                 printf("libfdt fdt_add_mem_rsv():  %s\n",
 599                                         fdt_strerror(err));
 600                                 return err;
 601                         }
 602                 } else if (argv[2][0] == 'd') {
 603                         unsigned long idx = simple_strtoul(argv[3], NULL, 16);
 604                         int err = fdt_del_mem_rsv(working_fdt, idx);
 605
 606                         if (err < 0) {
 607                                 printf("libfdt fdt_del_mem_rsv():  %s\n",
 608                                         fdt_strerror(err));
 609                                 return err;
 610                         }
 611                 } else {
 612                         /* Unrecognized command */
 613                         return CMD_RET_USAGE;
 614                 }
 615         }
 616 #ifdef CONFIG_OF_BOARD_SETUP
 617         /* Call the board-specific fixup routine */
 618         else if (strncmp(argv[1], "boa", 3) == 0) {
 619                 int err = ft_board_setup(working_fdt, gd->bd);
 620
 621                 if (err) {
 622                         printf("Failed to update board information in FDT: %s\n",
 623                                fdt_strerror(err));
 624                         return CMD_RET_FAILURE;
 625                 }
 626 #ifdef CONFIG_SOC_KEYSTONE
 627                 ft_board_setup_ex(working_fdt, gd->bd);
 628 #endif
 629         }
 630 #endif
 631         /* Create a chosen node */
 632         else if (strncmp(argv[1], "cho", 3) == 0) {
 633                 unsigned long initrd_start = 0, initrd_end = 0;
 634
 635                 if ((argc != 2) && (argc != 4))
 636                         return CMD_RET_USAGE;
 637
 638                 if (argc == 4) {
 639                         initrd_start = simple_strtoul(argv[2], NULL, 16);
 640                         initrd_end = simple_strtoul(argv[3], NULL, 16);
 641                 }
 642
 643                 fdt_chosen(working_fdt);
 644                 fdt_initrd(working_fdt, initrd_start, initrd_end);
 645
 646 #if defined(CONFIG_FIT_SIGNATURE)
 647         } else if (strncmp(argv[1], "che", 3) == 0) {
 648                 int cfg_noffset;
 649                 int ret;
 650                 unsigned long addr;
 651                 struct fdt_header *blob;
 652
 653                 if (!working_fdt)
 654                         return CMD_RET_FAILURE;
 655
 656                 if (argc > 2) {
 657                         addr = simple_strtoul(argv[2], NULL, 16);
 658                         blob = map_sysmem(addr, 0);
 659                 } else {
 660                         blob = (struct fdt_header *)gd->fdt_blob;
 661                 }
 662                 if (!fdt_valid(&blob))
 663                         return 1;
 664
 665                 gd->fdt_blob = blob;
 666                 cfg_noffset = fit_conf_get_node(working_fdt, NULL);
 667                 if (!cfg_noffset) {
 668                         printf("Could not find configuration node: %s\n",
 669                                fdt_strerror(cfg_noffset));
 670                         return CMD_RET_FAILURE;
 671                 }
 672
 673                 ret = fit_config_verify(working_fdt, cfg_noffset);
 674                 if (ret == 0)
 675                         return CMD_RET_SUCCESS;
 676                 else
 677                         return CMD_RET_FAILURE;
 678 #endif
 679
 680         }
 681 #ifdef CONFIG_OF_LIBFDT_OVERLAY
 682         /* apply an overlay */
 683         else if (strncmp(argv[1], "ap", 2) == 0) {
 684                 unsigned long addr;
 685                 struct fdt_header *blob;
 686                 int ret;
 687
 688                 if (argc != 3)
 689                         return CMD_RET_USAGE;
 690
 691                 if (!working_fdt)
 692                         return CMD_RET_FAILURE;
 693
 694                 addr = simple_strtoul(argv[2], NULL, 16);
 695                 blob = map_sysmem(addr, 0);
 696                 if (!fdt_valid(&blob))
 697                         return CMD_RET_FAILURE;
 698
 699                 /* apply method prints messages on error */
 700                 ret = fdt_overlay_apply_verbose(working_fdt, blob);
 701                 if (ret)
 702                         return CMD_RET_FAILURE;
 703         }
 704 #endif
 705         /* resize the fdt */
 706         else if (strncmp(argv[1], "re", 2) == 0) {
 707                 uint extrasize;
 708                 if (argc > 2)
 709                         extrasize = simple_strtoul(argv[2], NULL, 16);
 710                 else
 711                         extrasize = 0;
 712                 fdt_shrink_to_minimum(working_fdt, extrasize);
 713         }
 714         else {
 715                 /* Unrecognized command */
 716                 return CMD_RET_USAGE;
 717         }
 718
 719         return 0;
 720 }
 721
 722 /****************************************************************************/
 723
 724 /*
 725  * Parse the user's input, partially heuristic.  Valid formats:
 726  * <0x00112233 4 05>    - an array of cells.  Numbers follow standard
 727  *                      C conventions.
 728  * [00 11 22 .. nn] - byte stream
 729  * "string"     - If the the value doesn't start with "<" or "[", it is
 730  *                      treated as a string.  Note that the quotes are
 731  *                      stripped by the parser before we get the string.
 732  * newval: An array of strings containing the new property as specified
 733  *      on the command line
 734  * count: The number of strings in the array
 735  * data: A bytestream to be placed in the property
 736  * len: The length of the resulting bytestream
 737  */
 738 static int fdt_parse_prop(char * const *newval, int count, char *data, int *len)
 739 {
 740         char *cp;               /* temporary char pointer */
 741         char *newp;             /* temporary newval char pointer */
 742         unsigned long tmp;      /* holds converted values */
 743         int stridx = 0;
 744
 745         *len = 0;
 746         newp = newval[0];
 747
 748         /* An array of cells */
 749         if (*newp == '<') {
 750                 newp++;
 751                 while ((*newp != '>') && (stridx < count)) {
 752                         /*
 753                          * Keep searching until we find that last ">"
 754                          * That way users don't have to escape the spaces
 755                          */
 756                         if (*newp == '\0') {
 757                                 newp = newval[++stridx];
 758                                 continue;
 759                         }
 760
 761                         cp = newp;
 762                         tmp = simple_strtoul(cp, &newp, 0);
 763                         if (*cp != '?')
 764                                 *(fdt32_t *)data = cpu_to_fdt32(tmp);
 765                         else
 766                                 newp++;
 767
 768                         data  += 4;
 769                         *len += 4;
 770
 771                         /* If the ptr didn't advance, something went wrong */
 772                         if ((newp - cp) <= 0) {
 773                                 printf("Sorry, I could not convert \"%s\"\n",
 774                                         cp);
 775                                 return 1;
 776                         }
 777
 778                         while (*newp == ' ')
 779                                 newp++;
 780                 }
 781
 782                 if (*newp != '>') {
 783                         printf("Unexpected character '%c'\n", *newp);
 784                         return 1;
 785                 }
 786         } else if (*newp == '[') {
 787                 /*
 788                  * Byte stream.  Convert the values.
 789                  */
 790                 newp++;
 791                 while ((stridx < count) && (*newp != ']')) {
 792                         while (*newp == ' ')
 793                                 newp++;
 794                         if (*newp == '\0') {
 795                                 newp = newval[++stridx];
 796                                 continue;
 797                         }
 798                         if (!isxdigit(*newp))
 799                                 break;
 800                         tmp = simple_strtoul(newp, &newp, 16);
 801                         *data++ = tmp & 0xFF;
 802                         *len    = *len + 1;
 803                 }
 804                 if (*newp != ']') {
 805                         printf("Unexpected character '%c'\n", *newp);
 806                         return 1;
 807                 }
 808         } else {
 809                 /*
 810                  * Assume it is one or more strings.  Copy it into our
 811                  * data area for convenience (including the
 812                  * terminating '\0's).
 813                  */
 814                 while (stridx < count) {
 815                         size_t length = strlen(newp) + 1;
 816                         strcpy(data, newp);
 817                         data += length;
 818                         *len += length;
 819                         newp = newval[++stridx];
 820                 }
 821         }
 822         return 0;
 823 }
 824
 825 /****************************************************************************/
 826
 827 /*
 828  * Heuristic to guess if this is a string or concatenated strings.
 829  */
 830
 831 static int is_printable_string(const void *data, int len)
 832 {
 833         const char *s = data;
 834
 835         /* zero length is not */
 836         if (len == 0)
 837                 return 0;
 838
 839         /* must terminate with zero or '\n' */
 840         if (s[len - 1] != '\0' && s[len - 1] != '\n')
 841                 return 0;
 842
 843         /* printable or a null byte (concatenated strings) */
 844         while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) {
 845                 /*
 846                  * If we see a null, there are three possibilities:
 847                  * 1) If len == 1, it is the end of the string, printable
 848                  * 2) Next character also a null, not printable.
 849                  * 3) Next character not a null, continue to check.
 850                  */
 851                 if (s[0] == '\0') {
 852                         if (len == 1)
 853                                 return 1;
 854                         if (s[1] == '\0')
 855                                 return 0;
 856                 }
 857                 s++;
 858                 len--;
 859         }
 860
 861         /* Not the null termination, or not done yet: not printable */
 862         if (*s != '\0' || (len != 0))
 863                 return 0;
 864
 865         return 1;
 866 }
 867
 868
 869 /*
 870  * Print the property in the best format, a heuristic guess.  Print as
 871  * a string, concatenated strings, a byte, word, double word, or (if all
 872  * else fails) it is printed as a stream of bytes.
 873  */
 874 static void print_data(const void *data, int len)
 875 {
 876         int j;
 877         const char *env_max_dump;
 878         ulong max_dump = ULONG_MAX;
 879
 880         /* no data, don't print */
 881         if (len == 0)
 882                 return;
 883
 884         env_max_dump = env_get("fdt_max_dump");
 885         if (env_max_dump)
 886                 max_dump = simple_strtoul(env_max_dump, NULL, 16);
 887
 888         /*
 889          * It is a string, but it may have multiple strings (embedded '\0's).
 890          */
 891         if (is_printable_string(data, len)) {
 892                 puts("\"");
 893                 j = 0;
 894                 while (j < len) {
 895                         if (j > 0)
 896                                 puts("\", \"");
 897                         puts(data);
 898                         j    += strlen(data) + 1;
 899                         data += strlen(data) + 1;
 900                 }
 901                 puts("\"");
 902                 return;
 903         }
 904
 905         if ((len %4) == 0) {
 906                 if (len > max_dump)
 907                         printf("* 0x%p [0x%08x]", data, len);
 908                 else {
 909                         const __be32 *p;
 910
 911                         printf("<");
 912                         for (j = 0, p = data; j < len/4; j++)
 913                                 printf("0x%08x%s", fdt32_to_cpu(p[j]),
 914                                         j < (len/4 - 1) ? " " : "");
 915                         printf(">");
 916                 }
 917         } else { /* anything else... hexdump */
 918                 if (len > max_dump)
 919                         printf("* 0x%p [0x%08x]", data, len);
 920                 else {
 921                         const u8 *s;
 922
 923                         printf("[");
 924                         for (j = 0, s = data; j < len; j++)
 925                                 printf("%02x%s", s[j], j < len - 1 ? " " : "");
 926                         printf("]");
 927                 }
 928         }
 929 }
 930
 931 /****************************************************************************/
 932
 933 /*
 934  * Recursively print (a portion of) the working_fdt.  The depth parameter
 935  * determines how deeply nested the fdt is printed.
 936  */
 937 static int fdt_print(const char *pathp, char *prop, int depth)
 938 {
 939         static char tabs[MAX_LEVEL+1] =
 940                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
 941                 "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
 942         const void *nodep;      /* property node pointer */
 943         int  nodeoffset;        /* node offset from libfdt */
 944         int  nextoffset;        /* next node offset from libfdt */
 945         uint32_t tag;           /* tag */
 946         int  len;               /* length of the property */
 947         int  level = 0;         /* keep track of nesting level */
 948         const struct fdt_property *fdt_prop;
 949
 950         nodeoffset = fdt_path_offset (working_fdt, pathp);
 951         if (nodeoffset < 0) {
 952                 /*
 953                  * Not found or something else bad happened.
 954                  */
 955                 printf ("libfdt fdt_path_offset() returned %s\n",
 956                         fdt_strerror(nodeoffset));
 957                 return 1;
 958         }
 959         /*
 960          * The user passed in a property as well as node path.
 961          * Print only the given property and then return.
 962          */
 963         if (prop) {
 964                 nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len);
 965                 if (len == 0) {
 966                         /* no property value */
 967                         printf("%s %s\n", pathp, prop);
 968                         return 0;
 969                 } else if (nodep && len > 0) {
 970                         printf("%s = ", prop);
 971                         print_data (nodep, len);
 972                         printf("\n");
 973                         return 0;
 974                 } else {
 975                         printf ("libfdt fdt_getprop(): %s\n",
 976                                 fdt_strerror(len));
 977                         return 1;
 978                 }
 979         }
 980
 981         /*
 982          * The user passed in a node path and no property,
 983          * print the node and all subnodes.
 984          */
 985         while(level >= 0) {
 986                 tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset);
 987                 switch(tag) {
 988                 case FDT_BEGIN_NODE:
 989                         pathp = fdt_get_name(working_fdt, nodeoffset, NULL);
 990                         if (level <= depth) {
 991                                 if (pathp == NULL)
 992                                         pathp = "/* NULL pointer error */";
 993                                 if (*pathp == '\0')
 994                                         pathp = "/";    /* root is nameless */
 995                                 printf("%s%s {\n",
 996                                         &tabs[MAX_LEVEL - level], pathp);
 997                         }
 998                         level++;
 999                         if (level >= MAX_LEVEL) {
1000                                 printf("Nested too deep, aborting.\n");
1001                                 return 1;
1002                         }
1003                         break;
1004                 case FDT_END_NODE:
1005                         level--;
1006                         if (level <= depth)
1007                                 printf("%s};\n", &tabs[MAX_LEVEL - level]);
1008                         if (level == 0) {
1009                                 level = -1;             /* exit the loop */
1010                         }
1011                         break;
1012                 case FDT_PROP:
1013                         fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset,
1014                                         sizeof(*fdt_prop));
1015                         pathp    = fdt_string(working_fdt,
1016                                         fdt32_to_cpu(fdt_prop->nameoff));
1017                         len      = fdt32_to_cpu(fdt_prop->len);
1018                         nodep    = fdt_prop->data;
1019                         if (len < 0) {
1020                                 printf ("libfdt fdt_getprop(): %s\n",
1021                                         fdt_strerror(len));
1022                                 return 1;
1023                         } else if (len == 0) {
1024                                 /* the property has no value */
1025                                 if (level <= depth)
1026                                         printf("%s%s;\n",
1027                                                 &tabs[MAX_LEVEL - level],
1028                                                 pathp);
1029                         } else {
1030                                 if (level <= depth) {
1031                                         printf("%s%s = ",
1032                                                 &tabs[MAX_LEVEL - level],
1033                                                 pathp);
1034                                         print_data (nodep, len);
1035                                         printf(";\n");
1036                                 }
1037                         }
1038                         break;
1039                 case FDT_NOP:
1040                         printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]);
1041                         break;
1042                 case FDT_END:
1043                         return 1;
1044                 default:
1045                         if (level <= depth)
1046                                 printf("Unknown tag 0x%08X\n", tag);
1047                         return 1;
1048                 }
1049                 nodeoffset = nextoffset;
1050         }
1051         return 0;
1052 }
1053
1054 /********************************************************************/
1055 #ifdef CONFIG_SYS_LONGHELP
1056 static char fdt_help_text[] =
1057         "addr [-c]  <addr> [<length>]   - Set the [control] fdt location to <addr>\n"
1058 #ifdef CONFIG_OF_LIBFDT_OVERLAY
1059         "fdt apply <addr>                    - Apply overlay to the DT\n"
1060 #endif
1061 #ifdef CONFIG_OF_BOARD_SETUP
1062         "fdt boardsetup                      - Do board-specific set up\n"
1063 #endif
1064 #ifdef CONFIG_OF_SYSTEM_SETUP
1065         "fdt systemsetup                     - Do system-specific set up\n"
1066 #endif
1067         "fdt move   <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n"
1068         "fdt resize [<extrasize>]            - Resize fdt to size + padding to 4k addr + some optional <extrasize> if needed\n"
1069         "fdt print  <path> [<prop>]          - Recursive print starting at <path>\n"
1070         "fdt list   <path> [<prop>]          - Print one level starting at <path>\n"
1071         "fdt get value <var> <path> <prop>   - Get <property> and store in <var>\n"
1072         "fdt get name <var> <path> <index>   - Get name of node <index> and store in <var>\n"
1073         "fdt get addr <var> <path> <prop>    - Get start address of <property> and store in <var>\n"
1074         "fdt get size <var> <path> [<prop>]  - Get size of [<property>] or num nodes and store in <var>\n"
1075         "fdt set    <path> <prop> [<val>]    - Set <property> [to <val>]\n"
1076         "fdt mknode <path> <node>            - Create a new node after <path>\n"
1077         "fdt rm     <path> [<prop>]          - Delete the node or <property>\n"
1078         "fdt header [get <var> <member>]     - Display header info\n"
1079         "                                      get - get header member <member> and store it in <var>\n"
1080         "fdt bootcpu <id>                    - Set boot cpuid\n"
1081         "fdt memory <addr> <size>            - Add/Update memory node\n"
1082         "fdt rsvmem print                    - Show current mem reserves\n"
1083         "fdt rsvmem add <addr> <size>        - Add a mem reserve\n"
1084         "fdt rsvmem delete <index>           - Delete a mem reserves\n"
1085         "fdt chosen [<start> <end>]          - Add/update the /chosen branch in the tree\n"
1086         "                                        <start>/<end> - initrd start/end addr\n"
1087 #if defined(CONFIG_FIT_SIGNATURE)
1088         "fdt checksign [<addr>]              - check FIT signature\n"
1089         "                                        <start> - addr of key blob\n"
1090         "                                                  default gd->fdt_blob\n"
1091 #endif
1092         "NOTE: Dereference aliases by omitting the leading '/', "
1093                 "e.g. fdt print ethernet0.";
1094 #endif
1095
1096 U_BOOT_CMD(
1097         fdt,    255,    0,      do_fdt,
1098         "flattened device tree utility commands", fdt_help_text
1099 );